diff --git a/package.json b/package.json
index 5359c78..f5661c0 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "intmax2-function",
-  "version": "1.0.1",
+  "version": "1.0.2",
   "license": "MIT",
   "description": "A collection of function for INTMAX",
   "repository": {
diff --git a/packages/shared/package.json b/packages/shared/package.json
index 4de6337..4092841 100644
--- a/packages/shared/package.json
+++ b/packages/shared/package.json
@@ -18,7 +18,7 @@
     "pino": "^9.7.0",
     "pino-pretty": "^13.0.0",
     "viem": "^2.31.7",
-    "zod": "^3.25.74"
+    "zod": "^4.0.2"
   },
   "scripts": {
     "start": "node dist/index.js",
diff --git a/yarn.lock b/yarn.lock
index 2225bd7..b598220 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -925,7 +925,7 @@ __metadata:
     tsx: "npm:^4.20.3"
     typescript: "npm:^5.8.3"
     viem: "npm:^2.31.7"
-    zod: "npm:^3.25.74"
+    zod: "npm:^4.0.2"
   languageName: unknown
   linkType: soft
 
@@ -5297,9 +5297,9 @@ __metadata:
   languageName: node
   linkType: hard
 
-"zod@npm:^3.25.74":
-  version: 3.25.74
-  resolution: "zod@npm:3.25.74"
-  checksum: 10c0/59e38b046ac333b5bd1ba325a83b6798721227cbfb1e69dfc7159bd7824b904241ab923026edb714fafefec3624265ae374a70aee9a5a45b365bd31781ffa105
+"zod@npm:^4.0.2":
+  version: 4.0.2
+  resolution: "zod@npm:4.0.2"
+  checksum: 10c0/31d82196d5be1c8290a860e79b469c64934979a95533d6c7802cb164562a1584d03bc19fa349747f7c54e45fa85c10b2f731a2805626f96f8908bc94bccd38b8
   languageName: node
   linkType: hard